I am Luis, Mechanical Engineer of the Catholic University of Valparaíso Chile, I am carrying out my thesis in CODELCO-CHILE Division The Lieutenant, the topic that I develop is a Plan of Mantenance Predictive to the Hydraulic Systems of the Mine, this plan was based on carrying out him analysis of oil to the teams, the problems are that I have only 3 months to develop a record of the teams, the teams that I should analyze are perforation Jumbos. the problem this that the time that I have is very short as to be formed an idea of the evolution of the contamination inside them, as me it should focus this plan considering the little time that I have, so that it represents the conditions of evolution of the real contamination of the team.

Luis:
I really do not know if my answer gets to you too late but, anyway, you can find valuable information about preventive, predictive and condition based maintenance in this forum: http://maintenanceforums.com/groupee/forums.
You can join in the discussions no matter what is your experience level.
Go ahead and good luck ! ¡Adelante y buena suerte!